Mike Cotterill’s collection of yellow and silver parts continues to grow, and he must have needed most of it for the giant Gantry Crane which he demonstrated. The gantry is 6 ft. long, 1 ft. wide, and 4 ft. from ground level, being supported at the ends on inverted V frames spreading to 4 ft. apart on 4 bogies, each with 8 powered wheels.
Most of the machinery is aloft in the gantry beam, including two E15R’s which power the travelling gear and pdu’s for trolley motion and main hoist, dangling below. Atop the trolley is a further crane with 360° slew, screw luffing and double throw fly hook, also all driven by pdu’s.
The luffing was novel, incorporating a (lead) counterweight system moving on the rear of the cab.